Proctor-Beauchamp, C. R. (1981). Important old master pictures: The properties of Sir Christopher R. P. Beauchamp, the Brabourne Charitable Trust, Countess Bismarck ... ; Friday 10 July 1981. London: Christie's.
শিকাগো স্টাইলে সাইটেশনProctor-Beauchamp, Christopher Radstock. Important Old Master Pictures: The Properties of Sir Christopher R. P. Beauchamp, the Brabourne Charitable Trust, Countess Bismarck ... ; Friday 10 July 1981. London: Christie's, 1981.
এমএলএ সাইটেশনProctor-Beauchamp, Christopher Radstock. Important Old Master Pictures: The Properties of Sir Christopher R. P. Beauchamp, the Brabourne Charitable Trust, Countess Bismarck ... ; Friday 10 July 1981. London: Christie's, 1981.
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